Open AccessPhotophysical Studies on D-π-A Imidazole Derivative for Organic Dye Sensitized Solar Cell Application
Author(s) -
Shashikant Walki,
Hemantkumar M. Savanur,
M. K. Ravindra,
Soniya Naik,
G.H. Malimath,
Kittappa M. Mahadevan,
Lohit Naik
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22853
Subject(s) - photochemistry , dye sensitized solar cell , chemistry , fluorescence , absorbance , quenching (fluorescence) , imidazole , solar cell , acceptor , optoelectronics , organic chemistry , materials science , optics , electrode , chromatography , electrolyte , condensed matter physics , physics
In present study, a new organic dye 2-(4-chlorophenyl)-1-(4-methoxyphenyl)-4,5-diphenyl-1Himidazole(CMI) containing phenyl donor with imidazole ring as π-linker and chlorophenyl group asacceptor have been synthesized. The photophysical properties like solvato-chromism, optical bandgap and fluorescence lifetime are estimated using experimental as well as quantum chemicalcomputational techniques. Further, photosensitization of TiO2 nanoparticles from CMI dye has beeninvestigated using absorption, steady-state and time resolved fluorescence methods. The increase inabsorbance and a decrease in fluorescence spectra with different concentrations of TiO2 nanoparticlesconfirmed the possibility of interactions between dye and TiO2 nanoparticles. Rehm-Weller relationsuggests that a decrease in fluorescence of CMI dye was due to photo-induced electron transfer processand the Stern-Volmer studies suggest that the fluorescence quenching mechanism was due to combineddynamic and static quenching process. Further, dye-sensitized solar cell using this newly synthesizedCMI dye has been fabricated and characterized for their photovoltaic performance under illumination.Photovoltaic energy conversion efficiency and fill factor of the CMI dye were found to be 1.76% and0.56, respectively.